Is there an English word for a person who "voraciously" collects objects of his or her interest?
Check for the below word:
The definition from Google is as follows:
noun: completist; plural noun: completists
an obsessive, typically indiscriminate, collector or fan of something.
"this compilation of singles and B-sides has it usefulness for completists"
dictionary.com defines the same word as:
1.a person who attempts to complete a collection or set, especially a collector who wants to collect an example of every item in a particular field:
This recording is a must for obsessive Sinatra completists.
I'd only recommend this movie to Hepburn Completists.
This best suits the behaviour mentioned.